Chapter 3.1

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Vocabulary

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Volcano: a very weak spot in the Earth's crust where lava gushes/spills out.
Magma:molten rock from underneath the Earth's crust, not on top(usually confused with lava)
Lava:molten rock on to of Earth's crust, not underneath(usuallly confused with magma)
Ring of Fire: a major volcano belt
Island Arc:a string of islands created by a volcano
Hot Spot:an area where magma deep inside the mantle melts through the Earth's crust

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Outline

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What is a Volcano

• a weak spot in Earth's crust where lava comes out
  • can cause devastating damage
    • volcanoes sometimes form islands

Location of Volcanoes

• volcanoes form a kind of belt(where they are located)
  • most volcanoes occur along diverging plate boundaries
    • such as the mid-ocean ridge
    • in places where subduction occurs

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